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For this purpose, you must apply the nested <additionaldata> element to a pack's <file>:<fileset> or <singlefile>.

AttributeDescriptionValue range
keyAn action key to applypermission.dir | permission.file
valueA value to the above action key for specifying how to apply the particular action.


If the value begins with "0", it is interpreted an an octal number,
otherwise as a decimal number representing the chmod-compatible permission on the appropriate files when the listener is executing during the installation.